5.1a   A rock on a 1.5m string twirls around every .75 second.  Find Ac.


5.1b  Find w.


5.2   If the rock is .5 Kg, what is Fc?


5.3   What is the force of gravity between two 100Kg people standing a meter apart?


 5.3b  If  Mars is about 1.5 times farther from the Sun than us, then how long is a Martain year?


6.1  I push downward at a slight angle (15 degrees) to get a 100Kg box to slide 2meters across a floor.  Find the amount of work done.


6.1b  How many Joules does it take to extend a 2000N/m spring by 15cm?


6.2  How many atoms of Uranium would you have to split to get 1 Joules' worth of energy?


6.3  Doubling velocity has what effect on stopping distance of a car?


6.4   An 85 Kg Mock is lifted 2 meters off the floor.  How many atoms of Uranium would you have to split to get this done?


6.6   A dumbell (r = .5m, m = 10Kg) spins at 3r/s.  Find KErot


6.7   A Mock is on a 3m long swing.  He is raised up till the rope is horizontal, then released.  How fast is he going at the bottom?


6.8   From #6.4 above, if it takes 3seconds to lift the Mock, how many Watts were develpoed?